My parents bought one...they hate it. I layed in it a few times, for a nap or just talking to my mom and I have to agree with her. It was WONDERFUL for the first 2-3 years, then after that, the settings are slower, they've had to get the remotes fixed 3 times in the past 4 years, it's been a fight every time. One time I laid in it for a nap and wanted to change the setting on my moms side and I pressed the button to make it 2 or 3 steps softer than she had it, and it just kept getting softer and softer and softer- the remote was jammed and went as soft as it could go, all I felt was the bottom of the mattress. So I tried pressing the remote button 'up' to make it more firm and it went ALL the way firm. My mom said that they'd experianced those problems REGULARLY!!!!
My mom had back problems and bad neck pain before they got the bed. 2 years it was better (after the bed was purchased)...now she is ticked that they got the bed. They're getting rid of it and getting a different type of bed.
My neighbor always complains about hers as well, although I don't know exactly what problems they have exactly...
My husband and I went to a nice resort for our anniversary last year that had a sleep number. WE HATED IT...had problems with it 'adjusting' on us when we didn't even press the button the first night. So, the resort switched our room. The next sleep number bed in our new room wasn't that great either. It wasn't HORRIBLE, but we were not impressed.
For the money that they cost, I don't believe that they are worth it. AND you really have to be careful with their so called 'warrenty' because it doesn't cover some things- and if you have problems with the faulty remote 7 years down the road, they'll fight you to replace it and try to charge you some INSANE amount PER remote to get you a new one (at least they TRIED to with my parents!!!)